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Chapter 8 Part 1 Human Physiology

Across
Connective-tissue covering of the whole muscle extends beyond the ends of the muscle which attaches to the bone.
Accounts for 40% body weight in men and 32 percent body weight in women.
The total number of fibers innervated by a single motor neuron.
Regulatory protein involved in muscle contraction that interacts with calcium to allow binding of myosin heads to actin.
A muscle fiber is stimulated again before it has completely relaxed, the second contraction will piggyback on the first producing greater force than a single twitch.
The extent of the number of fibers contracting within a muscle.
Contraction which occurs when the muscle is lengthening as the force is applied, ex. lowering a weight.
Muscle length at which maximal tension can be developed.
Myosin heads bind with actin molecules on the thin filaments this is the displacement of ADP and Pi from the myosin head.
Contraction which occurs when the muscle shortens as the force is applied, ex. weight lifting.
Down
A smooth sustained contraction of maximal strength.
theory describes the molecular mechanisms responsible for contraction.
Regulatory protein involved in muscle contraction that interferes with the binding of myosin heads to actin when muscle relaxed.
Contraction in which the velocity of contraction remains constant as the muscle changes length
Muscle fibers are formed from the fusion of these cells during embryonic development.
A single action potential will generate a weak short-duration contraction.
Tendons are considered this type of components of the muscle that behave much like a stiff spring.
The link between excitation and contraction.
Contraction in which the load remains constant as the muscle changes length.
Contraction in which the tension develops at constant muscle length.